TY - JOUR
T1 - Strains of the soil fungus Mortierella show different degradation potentials for the phenylurea herbicide diuron
AU - Ellegaard-Jensen, Lea
AU - Aamand, Jens
AU - Kragelund, Birthe B.
AU - Johnsen, Anders H.
AU - Rosendahl, Søren
N1 - Funding Information:
Acknowledgments The authors thank Nora Badawi and Spire Kiersgaard for guidance on the UPLC method and Signe Sjørup and Allan Kastrup for expert technical assistance. The Study was supported by the MIRESOWA project funded by the Danish Council for Strategic Research (Grant No. 2104-08-0012).
PY - 2013/11
Y1 - 2013/11
N2 - Microbial pesticide degradation studies have until now mainly focused on bacteria, although fungi have also been shown to degrade pesticides. In this study we clarify the background for the ability of the common soil fungus Mortierella to degrade the phenylurea herbicide diuron. Diuron degradation potentials of five Mortierella strains were compared, and the role of carbon and nitrogen for the degradation process was investigated. Results showed that the ability to degrade diuron varied greatly among the Mortierella strains tested, and the strains able to degrade diuron were closely related. Degradation of diuron was fastest in carbon and nitrogen rich media while suboptimal nutrient levels restricted degradation, making it unlikely that Mortierella utilize diuron as carbon or nitrogen sources. Degradation kinetics showed that diuron degradation was followed by formation of the metabolites 1-(3,4-dichlorophenyl)-3-methylurea, 1-(3,4-dichlorophenyl)urea and an hitherto unknown metabolite suggested to be 1-(3,4-dichlorophenyl)-3-methylideneurea.
AB - Microbial pesticide degradation studies have until now mainly focused on bacteria, although fungi have also been shown to degrade pesticides. In this study we clarify the background for the ability of the common soil fungus Mortierella to degrade the phenylurea herbicide diuron. Diuron degradation potentials of five Mortierella strains were compared, and the role of carbon and nitrogen for the degradation process was investigated. Results showed that the ability to degrade diuron varied greatly among the Mortierella strains tested, and the strains able to degrade diuron were closely related. Degradation of diuron was fastest in carbon and nitrogen rich media while suboptimal nutrient levels restricted degradation, making it unlikely that Mortierella utilize diuron as carbon or nitrogen sources. Degradation kinetics showed that diuron degradation was followed by formation of the metabolites 1-(3,4-dichlorophenyl)-3-methylurea, 1-(3,4-dichlorophenyl)urea and an hitherto unknown metabolite suggested to be 1-(3,4-dichlorophenyl)-3-methylideneurea.
KW - Co-metabolism
KW - Fungal biodegradation
KW - Fungal genetics
KW - Pesticide
KW - Phylogenetic relationships
UR - http://www.scopus.com/inward/record.url?scp=84885867480&partnerID=8YFLogxK
U2 - 10.1007/s10532-013-9624-7
DO - 10.1007/s10532-013-9624-7
M3 - Article
VL - 24
SP - 765
EP - 774
JO - Biodegradation
JF - Biodegradation
SN - 0923-9820
IS - 6
ER -